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Amtech Systems Llc patents

Recent patent applications related to Amtech Systems Llc. Amtech Systems Llc is listed as an Agent/Assignee. Note: Amtech Systems Llc may have other listings under different names/spellings. We're not affiliated with Amtech Systems Llc, we're just tracking patents.

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System and method for estimating range to an rfid tag

A system is described for measuring distance between an rfid reader and an rfid backscatter tag, including an adaptive linear combiner, which is a tapped delay line with controllable weights on each tap, and outputs that are summed and subtracted from a reference to produce an error signal. After a sufficient number of cycles, the weight distribution indicates the delay of the received signal with respect to the reference, and by extension determines the distance between the tag and receiver.. ... Amtech Systems Llc

Multi-protocol rfid system

A multi-protocol rfid interrogating system employs a synchronization technique (step-lock) for a backscatter rfid system that allows simultaneous operation of closely spaced interrogators. The multi-protocol rfid interrogating system can communicate with backscatter transponders having different output protocols and with active transponders including: title 21 compliant rfid backscatter transponders; it2000 rfid backscatter transponders that provide an extended mode capability beyond title 21; egotm rfid backscatter transponders, segotm rfid backscatter transponders; ata, iso, ansi aar compliant rfid backscatter transponders; and iag compliant active technology transponders. ... Amtech Systems Llc

Rfid system with time slot interleaving

A method for interleaving time slots in a multi-antenna system for communication with rfid tags is disclosed. An example is shown for an eight antenna system. ... Amtech Systems Llc

Automatic mode detection in a dual operating mode rfid tag

A multi-mode, preferably dual mode, radio frequency identification (rfid) tag is adapted for automatic detection of whether a rfid reader located within communication range of the rfid tag is transmitting a continuous wave (cw) or modulated wave types of rf signal, and accordingly, mandating a response from the tag in read-only (ro) mode or read/write (r/w) mode, respectively. The tag includes means for designating one of the ro and r/w operating modes as a default mode of the tag, and for switching the tag from its default mode to its other operating mode, and vice versa, according to a rule for determining the frequency of occurrence of a selected event related to signal type of the reader. ... Amtech Systems Llc

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